The main event, which took place in the T-Mobile Arena in Las Vegas, was anticipated to be the highest-grossing fight in history due to years worth of bad blood between the men. McGregor began the feud in 2015 when, during an appearance on “The Conan O’Brien Show,” he said that a fight against Mayweather would be a “dance around the ring.”

But when Mayweather walked out in a black balaclava, everyone seemed to lose focus on the match. Maybe the boxer was trying to intimidate the younger fighter, or maybe it helped him keep his eyes on the prize.

Whatever Mayweather’s reasoning for the outfit, Twitter users certainly had some jokes.